Huge splenic cyst in a newborn: comparison with 10 cases in later childhood and adolescence.

Radiographic, sonographic, and histologic findings in a case of a huge splenic cyst in a newborn are presented. The patient had the characteristic findings, particularly the visceral displacement, associated with splenic cysts in a series of 10 older children and adolescents. The occurrence in a newborn of a large splenic cyst histologically similar to those found in older children supports the hypothesis that they are developmental rather than traumatically acquired.